Hello,

I really want to try NBS as it is such a great tool. But, I am not sure why my analysis is not working. I would appreciate some guidance to help me troubleshoot.

I keep getting the same error, "Stop: Design Matrix not found or inconsistent."

I set the path in Matlab for the NBS1.2 directory. Path to directory: D:/MATLAB/NBS1.2

The directory with my data (matrices..design matrix..) is NBS. Path to directory: D:/MATLAB/NBS

In Matlab I am working in the D:/MATLAB Directory. I even tried working directly in the NBS directory where my data is stored.

I am able to run the schnizophrenia example analysis with the data provided in the NBS1.2 folder, but nothing seems to work for my situation. I am using the Matlab version 2022a.

I tried looking at examples of design matrix txt files in this forum.

The 1st column is intercept, 2nd is patient (1) and then control (-1), 3rd is behavioural measure, and the 4th column is the interaction. As an aside, I have 14 patients and 14 controls. Here is the snippet of 3 patients, then 3 controls. 

1  1  91  91
1  1  89  89
1  1  90  90
1 -1 111 -111
1 -1 111 -111
1 -1  98  -98

For the contrast, I tried [0,0,0,1]. T-test. I even tried removing commas.

The second design matrix I tried to run was:

1 91 91
1 89 89
1 90 90
0 111 0
0 111 0
0 98 0

The 1st column is patient (1) and then control (0), 2nd is behavioural measure, and the 3rd column is the interaction.

I used the contrast [0,0,1] and again I selected T-test.

I still got the same error. I went back and looked at my matrices and even removed the NaN and replaced it with a value of 1. (I attached one of my matrices). I have 28 in total. I also made sure the path to the data was clearly written in NBS.

Am I missing something? I want to see how functional connectivity relates to behavioural measures of visual perception, and does this relationship differ between patient and control groups?

I look forward to any suggestions or if you can let me know why I keep getting the same error message that would be very much appreciated. I spent a lot of time alone trying to troubleshoot this issue with no sucess as of yet...

Thank you again.